Injector



.July s. 1924;4

W. J. FISH INJECTOR Filed Dec. 22. 1921 Patented July 8, 1924?.

iran- STATES WILLIAM JAMES FISH, OF VR0'USEV'lIIl-IE', PENNSYLVANIA.

INJECTOR.

Application led December 22, 1921. Serial No. 524,280.

To all/whom tm/ay concern.'-

Be it known that I, WILLIAM J. FISH, a citizen of the United States, and a resident of Rouseville, in the county of Venango and State of Pennsylvania, have -invented certain new and useful Improvements in Injectors, of which the following is a specificaion.

My in vention relates to injectors or spray- 1ng dev1ces for use in connection with oil engines.

Devices of this type are adapted to be screwed into an oil engine and the fuel oil is supplied to the cylinder through the injector or spraying device. The purpose of these injectors is to spray or feed the oil into the engine cylinder in a nely comminuted condition.

In general my invention relates to injectors of this general type and has for its particular object to provide a simple durable and eicient construction and furthermore, one wherein the working parts of the injector will be somewhat protected from the force of the explosions occurring in the engine cylinder.

Another feature of my invention resides in the provision of a removable valve seat and means for adjusting the tension applied 'to the valve. l

cylinder respectively and provided wit a.

spraying point, a slotted stand, a valve member and a spring interposed between said slotted member and'stand.

The operation of my improved invention and the features of construction thereofwill be made more apparent in the accompanyin specification and drawings, in which:

ig. l is a fragmentary sectional view of an engine cylinder with my invention applied thereto,

. Fig. 2 is an enlarged longitudinal section of the injector,

Fig. 3 is an elevation of the outer end of the injector,

Fig. 4 is an elevation of the inner end of the injector, and

Fig. 5 is a perspective view ofa detail ther f.

In the drawings wherein like numerals refer to like parts, the numeral 10 indicates a plug-like casing ,or housing threaded at one end thereof as indicated at 11 to enable itto be screwed into a combustion chamber or the like, such as the head of an engine cylinder 12 as illustrated in Fig. 1 of the drawings. Injectors when employed in connection with oil engines are connected to the cylinder of the engine in such a manner as to spray oil onto a hot plate or the like but inasmuch as this forms no part of my present invention, further detailed description thereof is believed unnecessary.

The other end of the plug-like casing which will hereafter be termed the outer end, is screw-threaded as indicated at 13 to enable it to be connected to the fuel supply pipe 14 usually in turn, connected to a pump. Such connection may be accomplished in any known manner but I have here shown a coupling sleeve 15 as the means of connecting the outer end of the casing 10 to the fuel supply pipe 14.

The casing 10 is squared as indicated at 16 for the reception of a tool whereby the casing 10 may be conveniently screwed into the wall of the engine cylinder and as is plainly obvious from the drawing, the threaded portion 11 is tapered to insure a leak-proof joint at this point.

The casing 10 is bored centrally and internally screw-threaded at one end thereof for the reception of an externally screwthreaded valve seat plug 17, which valve seat lug is bored centrally as indicated at 18. e outer end of the plug 17 is slotted as indicated at 19 for the accommodation of a tool whereby the seat plug may be screwed into the outer end of the casin 10.

Cooperating with the valve p ug is a valve formed with a reduced stem 20, a shank 21 and an-enlarged central portion 22. The stem 20 is connected to the enlarged central portion 22 by a beveled surface 23 and the diameter of the shank 21 is somewhat reduced so as to form a shoulder 24 against which one end of a spring 25 abufts. The

beveled portion 23 of the valve seats upon the inner end of the valve plug 17 as clearly illustrated in Fig. 2. The distance which the plug 17 may be screwed into the casing 10 is limited by-an inner shoulder 26 formed on the inside of the casing 10.'

The inner end of the easin 1Q is provided with internal screw-three. s for the reception of an externally threaded nozzle or plu'g27, provided with a beveled collar 28 which seats in a corresponding recess formed in the end of the casing 10 and provided further with a squared projection 29. The plug is in the form of a sleeve-like member, providing a central passage 3() while the squared portion 29 is pierced by a restricted opening 31 through which the oil is forced into the engine cylinder.

Interposed between the said plug 27 and the spring 25 is a spindle or stand 32, shown more in detail in F ig. 5. rlhe end of the stand 32 adjacent the valve is recessed as at 33 so as to loosely receive the end of the shank 21. The stand is provided with taper-4 ed cut-out portions 34 diametrically opposite one another, the deepest part of each cutout portion being disposed adjacent the recess 33, communication being established be? tween these cut-out portions and the recess 33 by apertures' 35. Commencing at the ends of the cut-out portions 34 and extending to the other end of the stand 32 is apair of diametrically disposed slots 36, the depth of which tapers toward the inner end of the stand 32, where` they meet, providing the stand 32 with a bifurcated end 37. The bifurcated end of the stand 32 abuts the spray plug 27, thereby enabling the stand 32 to be axially displaced by screwing inwardly on the plug 27.

As is clearly illustratedin Fig. 2, .the spring 25 abuts withone of its ends against the shoulder 24 formed on the valve member, while the other end of the spring lies against the outer end of the stand 32. 'Obviously a displacement in an outward direction of the stand 32 increases the tension of the spring 25 and hence, causes the valve member to "seat Amore firmly against the inner end of the valve plug 17.

In practice, the device is screwed into the cylinder of anengine and the outer end connected to the fuel supply from which fuel is obtained under pressure, usually by a pump. The oil enters the casing through the 'force of the explosion.

opening 18 in the valve plug andthe pressure thereof unseats the valve whereupon the .fuel is forced through the valve casing, durmg lts course passing through the recess 33, openings 35, cutout portions 34 and slots 36 in the stand 32, thence through the center of the spra plug and through restricted opening 31 mt'o the engine cylinder, where it 1s directed against the usual hot plate. When an explosion occurs the back pressure 1s borne mostly by the stand 32, thus protectlng the spring 25 and the valve from dlsastrous shocks. Because of the bifurcated end 37 and the longitudinally extendlng slots 36, the force of explosion is divided and passed backwardly toward the valve through the tapered slots 36, which as will be noted, taper in a direction to retard the These explosive gases must therefore pass through the restricted points where the cut-out portions 34 and the slots 36 Join and must thereafter furthermore pass through the restricted openings 35. Thus it will be seen that the force of the explosion coming back into the casing is dissipated considerably and no undue strains are exerted upon the valve or its associated spring. However, the force of the explosion which reaches the valve, augmented by the pressure of the spring 25 will be sufficient to seat the valve momentarily so as to prevent the passage of the explosive gases back into the fuel supply 1 e. plfs hereinbefore stated, the valve plugl 17 is removable and may be replaced when the same becomes worn or otherwise mutilated. The tension on the spring 25 which regulates the pressure with which the valve seats may be varied by proper rotation of the spray plug 27, which affects the spring through the stand 32. Obviously this may be easily accomplished because of the squared end 29 formed in this manner to\a.ccommodate the tool required for rotating the said plug.

As will be seen, the number of partsrequired in my improved construction are few in number and are so formed that they may be made durable and manufactured cheaply. However, my improved construction is conducive of the desired results in devices of this type in that the fuel is supplied to the engine cylinder in a spray as is necessary in this type of engine and liabilit of exhaust gases being forced into the el supply is guarded against.

While I have shown and illustrated one form of my invention, I do` not wishito be unnecessarily limited but reserve the right to make such changes and modiications as may come within the purview of the accompan ing claims.

aving thus described my invention, what I claim is: f'

l. In a device of the class 'described a housing adaptedto be inserted in the wall of an engine cylinder, means for supplying fuel to said housing, a valve, a spray plug and a stand interposed between said valve and said spray plug and provided with continuous tapering slots to dissipate the `back ressure through said housing.

2. n a device of the class described a plug-like casing adapted to be screwed into the'wall of an engine cylinder, said casing being hollow, means for suplying fuel under pressure to vsaid casing, a displaceable valvecontained within said casing, a spray plug t,

in the other endof said casing and a stand interposed between said valve and .said

cylinder, means at the other end of said casing for connecting it to a source of fuel supply, said casing being hollow,avalve and valve seat in said casing, spring means for causing said valve to seat, a spray plug in the other end of said casing and a stand interposed between said plug and said spring said stand being formed with a pair of tapering grooves forming a wedge-shaped obstruction, as and for the purpose described.

4. In an injector of the class described a plug-like hollow casing screw-threaded at both ends whereby it may be screwed into the wall of an engine cylinder and connected to a source of fuel supply, a removable valve plug formed with a seat secured in one end of said casing, a valve contained within said casingand seating on said plug, a spring associated with said valve for causing said valve to seat, a spray plug removably secured in the other end of said casing and a spindle-shaped stand contained within said casing and bearing with its ends against said spray plug and said spring respectively, whereby the tension of said springpmay be regulated by rotating said spray plug.

5. In a ldevice of the class described a plug-shaped hollow housing, said housing being thereof to enable the same to be screwed into the wall of an engine cylinder and connected to a fuel supply pipe, a threaded valve plug removably secured in one end of said casing and providing a valve seat, a displaceable valve within said casing, a spring associated with said valve and causing said valve to seat upon said plug, a removable spray plug secured in the other end of said casing, said plug being provided with a squared end and a spindle-like stand contained within said housing and bearing with its ends against said plug and said spring, said stand being formed at one end with a recess for the reception of the adjacent end of the valve, a pair of, diametrically disposed tapered cut-out portions and a pair of diametrically disposed tapering slots, said slots meeting at the other end of said stand, forming a bifurcatedA end therefor and providing a tortuous passage through which the fuel passes on its way through said housing.

threaded externally at both ends 

